Bottom portion of bottle case



FIG. 1 is a bottom perspective view of a bottom portion of a bottle case showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a side elevatioanal views thereof; and,

FIG. 5 is a top plan view thereof; and,

The broken lines depict environmental structure which forms no part of the claimed design. 

The ornamental design for a bottom portion of a bottle case, as shown and described. 